/*
 * Created on 18-Apr-2004
 * Created by Paul Gardner
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

package org.gudy.azureus2.platform;

import org.gudy.azureus2.core3.util.AEMonitor;
import org.gudy.azureus2.core3.util.Constants;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.plugins.platform.PlatformManagerException;

/**
 * @author parg
 * 
 */
public class PlatformManagerFactory {
    protected static PlatformManager platform_manager;
    protected static AEMonitor class_mon = new AEMonitor("PlatformManagerFactory");

    public static PlatformManager getPlatformManager() {
        try {
            boolean force_dummy = System.getProperty("azureus.platform.manager.disable", "false").equals("true");

            class_mon.enter();

            if (platform_manager == null && !force_dummy) {

                try {
                    String cla = System.getProperty("az.factory.platformmanager.impl", "");

                    if (cla.length() > 0) {

                        platform_manager = (PlatformManager) Class.forName(cla).newInstance();

                    } else {
                        if (getPlatformType() == PlatformManager.PT_WINDOWS) {

                            platform_manager = org.gudy.azureus2.platform.win32.PlatformManagerImpl.getSingleton();

                        } else if (getPlatformType() == PlatformManager.PT_MACOSX) {

                            platform_manager = org.gudy.azureus2.platform.macosx.PlatformManagerImpl.getSingleton();

                        } else if (getPlatformType() == PlatformManager.PT_UNIX) {

                            platform_manager = org.gudy.azureus2.platform.unix.PlatformManagerImpl.getSingleton();
                        }
                    }
                } catch (PlatformManagerException e) {

                    // exception will already have been logged

                } catch (Throwable e) {

                    Debug.printStackTrace(e);
                }
            }

            if (platform_manager == null) {

                platform_manager = org.gudy.azureus2.platform.dummy.PlatformManagerImpl.getSingleton();
            }

            return (platform_manager);

        } finally {

            class_mon.exit();
        }
    }

    public static int getPlatformType() {
        if (Constants.isWindows) {

            return (PlatformManager.PT_WINDOWS);

        } else if (Constants.isOSX) {

            return (PlatformManager.PT_MACOSX);

        } else if (Constants.isUnix) {

            return (PlatformManager.PT_UNIX);

        } else {
            return (PlatformManager.PT_OTHER);
        }
    }
}
